Greenlight Capital is an activist hedge fund started by David Einhorn in 1996. The firm primarily invests in the publicly traded North American corporate debt and equity markets. Greenlight Capital also manages a fund of funds and a private equity fund through its affiliates, Greenlight Masters and Greenlight Private Equity Partners.

Founder David Einhorn may be best know for his negative call on Lehman Brothers before the company's collapse in 2008. For months and months leading up to Lehman's bankruptcy filing Einhorn raised red flags that the company wasn't properly accounting for its massive mortgage exposure. The sour debt on its books ultimately led to its failure.

Mr. Einhorn has also been extremely bullish on gold due to the devaluing of the U.S. dollar and other fiat currencies.